ethercat-dkms failing to build against Linux kernel 6.1

DKMS make.log for ethercat-dkms-1.5.2 for kernel 6.1.0-9-rt-amd64 (x86_64)
Tue Jun 27 02:17:20 PM CDT 2023
configure: WARNING: unrecognized options: --disable-igbvf, --disable-ixgbevf
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a race-free mkdir -p... /usr/bin/mkdir -p
checking for gawk... no
checking for mawk... mawk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
checking whether make supports nested variables... (cached) yes
checking for a sed that does not truncate output... /usr/bin/sed
checking for pkg-config... /usr/bin/pkg-config
checking pkg-config is at least version 0.9.0... yes
checking whether make supports the include directive... yes (GNU style)
checking for gcc... gcc-12
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables...
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether the compiler supports GNU C... yes
checking whether gcc-12 accepts -g... yes
checking for gcc-12 option to enable C11 features... none needed
checking whether gcc-12 understands -c and -o together... yes
checking dependency style of gcc-12... gcc3
checking for ar... ar
checking the archiver (ar) interface... ar
checking for g++... g++
checking whether the compiler supports GNU C++... yes
checking whether g++ accepts -g... yes
checking for g++ option to enable C++11 features... none needed
checking dependency style of g++... gcc3
checking build system type... x86_64-pc-linux-gnu
checking host system type... x86_64-pc-linux-gnu
checking how to print strings... printf
checking for a sed that does not truncate output... (cached) /usr/bin/sed
checking for grep that handles long lines and -e... /usr/bin/grep
checking for egrep... /usr/bin/grep -E
checking for fgrep... /usr/bin/grep -F
checking for ld used by gcc-12... /usr/bin/ld
checking if the linker (/usr/bin/ld) is GNU ld... yes
checking for BSD- or MS-compatible name lister (nm)... /usr/bin/nm -B
checking the name lister (/usr/bin/nm -B) interface... BSD nm
checking whether ln -s works... yes
checking the maximum length of command line arguments... 1572864
checking how to convert x86_64-pc-linux-gnu file names to x86_64-pc-linux-gnu format... func_convert_file_noop
checking how to convert x86_64-pc-linux-gnu file names to toolchain format... func_convert_file_noop
checking for /usr/bin/ld option to reload object files... -r
checking for file... file
checking for objdump... objdump
checking how to recognize dependent libraries... pass_all
checking for dlltool... no
checking how to associate runtime and link libraries... printf %s\n
checking for archiver @FILE support... @
checking for strip... strip
checking for ranlib... ranlib
checking command to parse /usr/bin/nm -B output from gcc-12 object... ok
checking for sysroot... no
checking for a working dd... /usr/bin/dd
checking how to truncate binary pipes... /usr/bin/dd bs=4096 count=1
checking for mt... mt
checking if mt is a manifest tool... no
checking for stdio.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for strings.h... yes
checking for sys/stat.h... yes
checking for sys/types.h... yes
checking for unistd.h... yes
checking for dlfcn.h... yes
checking for objdir... .libs
checking if gcc-12 supports -fno-rtti -fno-exceptions... no
checking for gcc-12 option to produce PIC... -fPIC -DPIC
checking if gcc-12 PIC flag -fPIC -DPIC works... yes
checking if gcc-12 static flag -static works... yes
checking if gcc-12 supports -c -o file.o... yes
checking if gcc-12 supports -c -o file.o... (cached) yes
checking whether the gcc-12 linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes
checking whether -lc should be explicitly linked in... no
checking dynamic linker characteristics... GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
checking whether stripping libraries is possible... yes
checking if libtool supports shared libraries... yes
checking whether to build shared libraries... yes
checking whether to build static libraries... yes
checking how to run the C++ preprocessor... g++ -E
checking for ld used by g++... /usr/bin/ld -m elf_x86_64
checking if the linker (/usr/bin/ld -m elf_x86_64) is GNU ld... yes
checking whether the g++ linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes
checking for g++ option to produce PIC... -fPIC -DPIC
checking if g++ PIC flag -fPIC -DPIC works... yes
checking if g++ static flag -static works... yes
checking if g++ supports -c -o file.o... yes
checking if g++ supports -c -o file.o... (cached) yes
checking whether the g++ linker (/usr/bin/ld -m elf_x86_64) supports shared libraries... yes
checking dynamic linker characteristics... (cached) GNU/Linux ld.so
checking how to hardcode library paths into programs... immediate
checking whether to build kernel modules... yes
checking for Linux kernel sources... /lib/modules/6.1.0-9-rt-amd64/build (Kernel 6.1)
checking for Linux modules installation directory... ethercat
checking whether to build the CCAT driver... yes
checking for RTAI path... not specified.
checking for Xenomai path... not specified.
checking whether to build RTDM interface... no
checking whether to build the debug interface... no
checking whether to build the debug ring... no
checking whether to build with EoE support... yes
checking whether to use the CPU timestamp counter... no
checking whether to use high-resolution timers for scheduling... no
checking whether to read alias addresses from registers... no
checking whether to build the command-line tool... no
checking whether to build the userspace library... no
checking whether to build the tty driver... yes
checking whether to allow identification wildcards... yes
checking for number of Ethernet devices... 1 (Redundancy disabled)
checking whether to assign the SII to PDI... yes
checking whether to syslog in realtime context... yes
checking that generated files are newer than configure... done
configure: creating ./config.status
config.status: creating Doxyfile
config.status: creating Kbuild
config.status: creating Makefile
config.status: creating devices/Kbuild
config.status: creating devices/Makefile
config.status: creating devices/ccat/Kbuild
config.status: creating devices/ccat/Makefile
config.status: creating devices/e1000/Kbuild
config.status: creating devices/e1000/Makefile
config.status: creating devices/e1000e/Kbuild
config.status: creating devices/e1000e/Makefile
config.status: creating devices/igb/Kbuild
config.status: creating devices/igb/Makefile
config.status: creating ethercat.spec
config.status: creating examples/Kbuild
config.status: creating examples/Makefile
config.status: creating examples/dc_rtai/Kbuild
config.status: creating examples/dc_rtai/Makefile
config.status: creating examples/dc_user/Makefile
config.status: creating examples/mini/Kbuild
config.status: creating examples/mini/Makefile
config.status: creating examples/rtai/Kbuild
config.status: creating examples/rtai/Makefile
config.status: creating examples/rtai_rtdm/Makefile
config.status: creating examples/rtai_rtdm_dc/Makefile
config.status: creating examples/tty/Kbuild
config.status: creating examples/tty/Makefile
config.status: creating examples/user/Makefile
config.status: creating examples/xenomai/Makefile
config.status: creating examples/xenomai_posix/Makefile
config.status: creating include/Makefile
config.status: creating lib/Makefile
config.status: creating lib/libethercat.pc
config.status: creating master/Kbuild
config.status: creating master/Makefile
config.status: creating script/Makefile
config.status: creating script/init.d/Makefile
config.status: creating script/init.d/ethercat
config.status: creating script/sysconfig/Makefile
config.status: creating tool/Makefile
config.status: creating tty/Kbuild
config.status: creating tty/Makefile
config.status: creating config.h
config.status: executing depfiles commands
config.status: executing libtool commands
configure: WARNING: unrecognized options: --disable-igbvf, --disable-ixgbevf
make -C "/lib/modules/6.1.0-9-rt-amd64/build" M="/var/lib/dkms/ethercat-dkms/1.5.2/build" INSTALL_MOD_DIR="ethercat" modules
make[1]: Entering directory '/usr/src/linux-headers-6.1.0-9-rt-amd64'
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/examples/mini/mini.o
  LD [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/examples/mini/ec_mini.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/examples/tty/serial.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/examples/tty/tty.o
  LD [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/examples/tty/ec_tty_example.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/cdev.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/coe_emerg_ring.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/datagram.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/datagram_pair.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/device.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/domain.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/flag.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/fmmu_config.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/foe_request.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/fsm_change.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/fsm_coe.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/fsm_foe.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/fsm_master.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/fsm_pdo.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/fsm_pdo_entry.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/fsm_sii.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/fsm_slave.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/fsm_slave_config.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/fsm_slave_scan.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/fsm_soe.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/ioctl.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/mailbox.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/master.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/module.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/pdo.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/pdo_entry.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/pdo_list.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/reg_request.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/sdo.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/sdo_entry.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/sdo_request.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/slave.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/slave_config.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/soe_errors.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/soe_request.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/sync.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/sync_config.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/voe_handler.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/ethernet.o
  LD [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/master/ec_master.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/devices/ccat/module.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/devices/ccat/netdev.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/devices/ccat/sram.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/devices/ccat/update.o
  LD [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/devices/ccat/ec_ccat.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/devices/generic.o
  LD [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/devices/ec_generic.o
  CC [M]  /var/lib/dkms/ethercat-dkms/1.5.2/build/tty/module.o
/var/lib/dkms/ethercat-dkms/1.5.2/build/tty/module.c: In function ‘ec_tty_init_module’:
/var/lib/dkms/ethercat-dkms/1.5.2/build/tty/module.c:148:18: error: implicit declaration of function ‘alloc_tty_driver’ [-Werror=implicit-function-declaration]
  148 |     tty_driver = alloc_tty_driver(EC_TTY_MAX_DEVICES);
      |                  ^~~~~~~~~~~~~~~~
/var/lib/dkms/ethercat-dkms/1.5.2/build/tty/module.c:148:16: warning: assignment to ‘struct tty_driver *’ from ‘int’ makes pointer from integer without a cast [-Wint-conversion]
  148 |     tty_driver = alloc_tty_driver(EC_TTY_MAX_DEVICES);
      |                ^
/var/lib/dkms/ethercat-dkms/1.5.2/build/tty/module.c:175:5: error: implicit declaration of function ‘put_tty_driver’ [-Werror=implicit-function-declaration]
  175 |     put_tty_driver(tty_driver);
      |     ^~~~~~~~~~~~~~
/var/lib/dkms/ethercat-dkms/1.5.2/build/tty/module.c: At top level:
/var/lib/dkms/ethercat-dkms/1.5.2/build/tty/module.c:750:19: error: initialization of ‘unsigned int (*)(struct tty_struct *)’ from incompatible pointer type ‘int (*)(struct tty_struct *)’ [-Werror=incompatible-pointer-types]
  750 |     .write_room = ec_tty_write_room,
      |                   ^~~~~~~~~~~~~~~~~
/var/lib/dkms/ethercat-dkms/1.5.2/build/tty/module.c:750:19: note: (near initialization for ‘ec_tty_ops.write_room’)
/var/lib/dkms/ethercat-dkms/1.5.2/build/tty/module.c:751:24: error: initialization of ‘unsigned int (*)(struct tty_struct *)’ from incompatible pointer type ‘int (*)(struct tty_struct *)’ [-Werror=incompatible-pointer-types]
  751 |     .chars_in_buffer = ec_tty_chars_in_buffer,
      |                        ^~~~~~~~~~~~~~~~~~~~~~
/var/lib/dkms/ethercat-dkms/1.5.2/build/tty/module.c:751:24: note: (near initialization for ‘ec_tty_ops.chars_in_buffer’)
cc1: some warnings being treated as errors
make[3]: *** [/usr/src/linux-headers-6.1.0-9-common-rt/scripts/Makefile.build:255: /var/lib/dkms/ethercat-dkms/1.5.2/build/tty/module.o] Error 1
make[2]: *** [/usr/src/linux-headers-6.1.0-9-common-rt/scripts/Makefile.build:505: /var/lib/dkms/ethercat-dkms/1.5.2/build/tty] Error 2
make[1]: *** [/usr/src/linux-headers-6.1.0-9-common-rt/Makefile:2037: /var/lib/dkms/ethercat-dkms/1.5.2/build] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-6.1.0-9-rt-amd64'
make: *** [Makefile:944: modules] Error 2